El codigo para manejar un carrito con motor mas info en https://www.youtube.com/watch?v=bJKBZdasuA8

CarritoSimple.ino

int MotorD[2] = {10, 11};
int MotorI[2] = {5, 6};

void setup() {
  for (int i = 0; i < 2 ; i++) {
    pinMode(MotorD[i], OUTPUT);
    pinMode(MotorI[i], OUTPUT);
  }
}

void loop() {
  Izquierda();
  delay(1000);
  Reposo();
  delay(1000);
}


void Reposo() {
  digitalWrite(MotorD[0], LOW);
  digitalWrite(MotorD[1], LOW);
  digitalWrite(MotorI[0], LOW);
  digitalWrite(MotorI[1], LOW);
}

void Adelante() {
  digitalWrite(MotorD[0], HIGH);
  digitalWrite(MotorD[1], LOW);
  digitalWrite(MotorI[0], HIGH);
  digitalWrite(MotorI[1], LOW);
}

void Reverza() {
  digitalWrite(MotorD[0], LOW);
  digitalWrite(MotorD[1], HIGH);
  digitalWrite(MotorI[0], LOW);
  digitalWrite(MotorI[1], HIGH);
}

void Izquierda() {
  digitalWrite(MotorD[0], LOW);
  digitalWrite(MotorD[1], HIGH);
  digitalWrite(MotorI[0], HIGH);
  digitalWrite(MotorI[1], LOW);
}

void Derecha() {
  digitalWrite(MotorD[0], HIGH);
  digitalWrite(MotorD[1], LOW);
  digitalWrite(MotorI[0], LOW);
  digitalWrite(MotorI[1], HIGH);
}

void Paro() {
  digitalWrite(MotorD[0], HIGH);
  digitalWrite(MotorD[1], HIGH);
  digitalWrite(MotorI[0], HIGH);
  digitalWrite(MotorI[1], HIGH);
}